Universal Century, or the timeline of the original show and various sequels/prequels.
Essentially Gundam, Zeta Gundam, Gundam ZZ, Char's Counterattack, Gundam Unicorn, Hathaway's Flash, with Victory Gundam even further in the future. It gets a bit tiring when there is a group of Gundam fans always advocating for a return to the UC.
I feel adapting a specific story is also a mistake, as it takes away the advantage of making a Gundam movie, making it a specific adaptation, with all the pitfalls that involves.
But hey, making MAGA Sweeney into a Zeon character seems fitting.